My rooster has a knot in his neck shortly under his head!!

My 2 rooster got into a wire fight not to long ago.... One did not make it do to snags in wire. Now the one who did make it has a what looks like goose egg in his throat. He drinks on his own but feed has been a chore. I don't want him to starve to death n I know where his crop is. This knot is higher! What could it ne?? Is it serious?